Dry ice pack



Aug. 14, 1951 H. E. HIF"PS ETAL DRY ICE PACK Filed Sept. 1, 1948JNVENTORS: HERBERT E. H/PPS' EUGENE J. KUPJAGK ATT'Y Patented Aug. 14,1951 DRY ICE PACK Herbert E. Hipps, Waco, Tex, and Eugene J. Kupjack,Park Ridge, Ill.

Application September 1, 1948, Serial No. 47,308

9 Claims.

This invention relates to an ice bag or pack and is more particularlydescribed as a flexible container for Dry Ice or any similar icesubstitute. The container may also be used for cracked ice, ice cubes,and the like, if desired, by mak ing the closure water proof.

In using and applying Dry Ice, which is solidified carbon dioxide, onobjection is that it can not be applied directly to the exposed skin ofa person and even if applied in an ordinary bag or pack, the lumps orprojections engage and contact a person, localizing the application,causing discomfort and even causing irritation and burns if the Dry Iceis not sufiiciently insulated. In the present invention this objectionis overcome by providing the ice bag with a metallic cloth or mesh forspreading the cold to all parts of the bag, eliminating sharpprojections caused by lumps or blocks, and making the application ofcold in therapy more efficient and to cover a larger area for the amountof Dry Ice contained.

An important object of the invention is to provide a container for lumpsor blocks of ice or Dry Ice in which a liner of metallic cloth or meshacts to level projections of the material and to spread the cold to allparts of the container.

A further object of the invention is to provide a liner of flexiblemetallic mesh or cloth in a Dry Ice bag covered with a porous insulationto prevent too direct an application of cold at the outside of the bag.

Still a further object of the invention is to provide a container forDry Ice which preserves and disperses the cold and also allows the freeescape of vapor therefrom.

Other objects of the invention will appear in the specification and willbe apparent from the accompanying drawings, in which,

Fig. 1 is a. perspective view of the exterior of a container inaccordance with this invention;

Fig. 2 is a perspective view of a portion of the interior of thecontainer shown in Fig. 1, spread apart for showing the various insidelayers; and

Fig. 3 is a sectional detail showing the layers of the container inrelation to material within the container.

In providing a container for Dry Ice, 9, material must be used which isnot affected by this refrigerant, and the latter should not be in directcontact with the metal mesh fabric. The container should not be leftopen exposing the Dry Ice, but a sufficient vent must be left open topermit the escape of the Dry Ice vapor. The Dry Ice material passesdirectly from a solid state to a vapor, and does not tend to moisten 2the interior of the container, out an escape must be afforded for thevapor.

Referring now more particularl to the drawings, a finished bag,container, or Dry Ice pack is shown in one form in Fig. 1. It may bemade in various sizes and shapes,.for special purposes and applications,and comprises essentially an outer cover 6, an inner insulatingliner 8,a metallic mesh fabric l0 and an inner insulating container [2 forreceiving Dry Ice M.

The outer cover 6 may be in the form of an open bag with an overlappingflap l6 secured in closed position by a snap fastener IB. At the bottomcorners are fastening ears 2!) and projecting from the upper corners atthe sides'are fastening ears 22. The material of the cover is preferablya flexible rubber-like fabric, or a plastic like Koroseal; it should notbe hardened, made brittle, or otherwise adversely affected by therefrigerant. The open end of the bag is closed by an open mesh fastener,like a zipper 24 having a movable slider 25 actuated manually by a loop26.

Within the bag and preferably co-extensive with the inside of the coveris the insulating liner 8 which is made preferably of open mesh,fibrous, somewhat fluffy material, such as terry cloth or toweling,through which cold will pass freely and readily from the inside to thecover. In direct inner contact with the liner 8 is the metallic fabriclfi also in the form of an open mouth bag and composed of aluminum,silver, copper, or any well known heat conducting metal. At the insideof the metallic fabric i0 is the other insulating container [2 intowhich the Dry Ice M is deposited. This insulating layer is alsopreferably composed of terry cloth, toweling, or similar material. Theinsulating container l2 prevents direct contact of the Dry Ice with themetallic fabric which tends to become imbedded in the Dry Ice, just likeordinary ice, which produces a localizing efiect directly to be avoided.

The upper or open edges of the several parts which make up thiscontainer are secured to gether at the sides of the zipper 24 leavingthe intermeshing parts of the zipper free and unob- 'structed for thepassage of vapor therethrough from the Dry Ice. The flap l6 fits looselyand is not intend-ed to confine the vapor in the container.

With this construction it is necessary only to open the container byopening the zipper 24, to insert the Dry Ice l4, spreading it as evenlytherein as possible. The zipper is closed, and the flap is left open orclosed as desired. The

container is then applied or placed for cold therapy treatments, andsince the Dry Ice is contained in a closed space it will last for aconsiderable time and will apply the cold evenly and efficiently due tothe metallic fabric. Any residue of Dry Ice may be discharged from thecontainer or may be completely vaporized in and from the container, andsince it leaves no moisture the inside of the containerremains clean anduncontaminated for the next use.

Although but a single form of the invention has been described, itshould be regarded as an illustration or example and not as a limitationor restriction, as many changes may be made in the construction,combination, and arrangement of the parts without departing from thespirit and scope of the invention.

We claim:

1. A Dry Ice container having a flexible cover bag, and a metallicflexible mesh fabric as a liner within the cover bag for receiving DryIce therein and diffusing cold therefrom.

2. A Dry Ice container comprising a bag with an inner lining of metallicflexible mesh fabric to diffuse cold from Dry Ice inserted therein, anda common closure for the bag and the lining.

3. A Dry Ice container comprising a composite bag with different layersincluding a closable cover, an insulation closable within the cover, anda flexible metallic mesh bag within the insulation and into which theDry Ice is inserted and by which the cold therefrom is diffused.

4. A Dry Ice container comprising a flexible cover in the form of aclosable bag, an inner closable liner of insulating fabric, a closableflexible metallic mesh bag Within the inner liner, and'a second liner ofinsulating fabric within the metallic mesh bag for receiving Dry Icetherein.

5. A Dry Ice container in the form of a bag having an open mesh zipperclosure, an insulating liner for the bag, and a cold dispersing innerlining within the insulating lining for holding Dry Ice therein, theinsulating liner and the cold dispersing liner being also connected tothe zipper closure for opening and closing therewith.

6. A Dry Ice container comprising a flexible cover bag having an openmesh closure, a flexible metallic mesh fabric within the bag, aninsulating fabric lining between the cover and the at the inside of themetal mesh fabric, and the edges of the linings and metal mesh fabricbeing secured to the edges of the open mesh closure to open theinnermost insulating lining for the insertion of Dry Ice therein.

7. A Dry Ice container comprising an outer flexible cold conducting,cover, a metallic. flexible mesh fabric bag within the cover, andflexible fabric insulating linings of toweling material at the insideand the outside of the metallic mesh bag, the metallic mesh dispersingthe cold throughout the container and the insulating linings conservingthe cold.

8. A Dry Ice container comprising an outer flexible cold conductingcover with an open end and a closable flap, an open-end bag of metallicflexible mesh fabric within the cover, a pair of towel fabric insulatinglinings one for the outside and the other for the inside of the metallicmesh bag, and an open mesh closure secured to corresponding edges of thecover, the linings and the metallic mesh fabric to close and open themsimultaneously, the metallic mesh dispersing cold from Dry Ice in thecontainer and vapor escaping through the open mesh closure when the DryIce is in the container.

9. A Dry Ice container comprising a flexible cover bag, a metallicflexible mesh fabric container within the bag into which the Dry Ice. isinserted, and a common open mesh closure for the bag and the metallicmesh fabric container through which fumes from the Dry Ice may exude.

HERBERT E. HIPPS. EUGENE J, KUPJACK.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 117,013 Stroock July 11, 1871743,473 Enax Nov. 10, 1903 1,941,173 Horovitz Dec. 26, 1933 2,037,592Rice Apr. 14, 1936 2,288,745 Sammis July 7, 1942

1. A DRY ICE CONTAINER HAVING A FLEXIBLE COVER BAG, AND A METALLICFLEXIBLE MESH FABRIC AS A LINER WITHIN THE COVER BAG FOR RECEIVING DRYICE THEREIN AND DIFFUSING COLD THEREFROM.